<form id="frmSearch" action="<?php echo home_url( '/' ); ?>" method="get">
    <input type="text" class="textInput" value="Search..." name="s" onfocus="if( this.value == 'Search...' ) this.value = '';" onblur="if( this.value == '' ) this.value = 'Search...';" />
    <input type="submit" class="submit" value="" />
</form><!--end #frmSearch -->